General Troubleshooting - Comtrol DeviceMaster LT User Manual

Table of Contents

General Troubleshooting

DeviceMaster LT User Guide: 2000586 Rev. B

This table illustrates some general troubleshooting tips.

Note: Make sure that you have reviewed the

111.

General Condition

Status LED flashing

Status LED not lit

Can ping the Comtrol

device, but cannot open

the ports from a remote

location.

(You must have

previously programmed

the IP address, subnet

mask, and IP gateway.)

Cannot ping the device

through Ethernet hub

Cannot ping or connect

to the DeviceMaster LT

Troubleshooting Checklist

Explanation/Action

Indicates that the bootloader has not downloaded to the

DeviceMaster LT.

1. If applicable, remove the NS-Link driver.

2. Make sure that you have downloaded the most

current driver:

ftp://ftp.comtrol.com/dev_mstr/LT/

drivers/.

3. Install the latest driver and configure the

DeviceMaster LT using the MAC address. Make

sure that you reboot the system. See

(NS-Link) Installation

Note: If the Status LED is still flashing, contact

Technical Support.

Indicates that power has not been applied or there is a

hardware failure. Contact Technical Support.

The NS-Link driver uses Port 4606 (11FE h) to

communicate with the DeviceMaster LT.

When using a sniffer to track NS-Link packets, filtering

for Port 4606 will easily track the packet. The packet

should also contain the MAC address of the device and

the originating PC so that it can be determined if the

packet is able to travel the full distance one way or not.

If the 4606 packet is found on one side of a firewall or

router, using sniffer, and not on the other side, then that

port needs to be opened up to allow the 4606 to pass.

This will most often be seen with firewalls, but is also

seen in some routers.

Isolate the DeviceMaster LT from the network. Connect

the device directly to the NIC in the host system.

The default DeviceMaster LT IP address is often not

accessible due to the subnet masking from another

network unless 192.168 is used in the network.

In most cases, it will be necessary to program in an

address that conforms to your network. See

the Network Settings

on Page 18 to use PortVision DX to

program the IP address.

If you do not use PortVision DX (or the NS-Link driver

for Windows) to program the IP address, you can use

RedBoot.

If you use RedBoot, you only have 15 seconds to disable

the Bootloader with RedBoot to get into the setup

utility. See

RedBoot Procedures

RedBoot method of programming an IP address.

Troubleshooting and Technical Support - 113